不同温湿度组合对甜菜夜蛾生长发育及繁殖力的影响

Effect of different combinations of temperature and humidity on the development and fecundity of Spodoptera exigua .

不同温湿组合对甜菜夜蛾各虫态生长发育和繁殖力有明显的影响，适宜该虫生长发育的温湿度为２６℃与ＲＨ８０％或ＲＨ９４％两个组合．在这种条件下，其卵孵化率、１～５龄幼虫存活率、蛹羽化率、雌虫比率、产卵的雌虫比率和平均产卵量分别为８２．６３％～８３．７０％、８１．９０％～８２．４７％、８８．００％～８８．０３％、９０．４０％～９１．００％、９３．３６％～９４．１７％、９５．９７％～９６．２６％、９２．７７％～９４．１６％、０．４２～０．４３、０．９８和６０５～６０６粒／雌，且明显高于其它温湿组合．在温湿度为３２℃与ＲＨ９４％条件下，该虫的内禀增长能力最大（０．２２５）．

Different combinations of temperature and relative humidity(RH) significantly affected the development and the fecundity of beet armyworm ( Spodoptera exigua ). The combination of 26℃ and RH 80% or 94% was optimal for the development of beet armyworm. Under this combination, the hatchability of egg, the survival rate of 1～5 instar larvae, the rates of emergence, female, and female ovipositing, and the mean quantity of oviposition were 82.63～ 83.70%, 81.90 ～82.47%,88.00～88.03%, 90.40～91.00%, 93.36～94.17%, 95.97～96.26%, 92.77～94.16%, 0.42 ～0.43, 0.98 and 605～606 eggs/female respectively, which were all significantly higher than those of other combinations. Under combination of 32℃ and RH 94%, the population's innate capacity of increase was the highest ( 0.225 ).